What is the medium that sound waves travel through when a person speaks?

a. Air

c. Vocal cords

b. Your tongue

d. It does not use a medium

Which waves are mechanical waves? A. microwaves B. sound waves C. light waves D. radio waves

Which way do electrons within a rectangular rod move when a negatively-charged balloon is brought near a positively-charged rod?

Which one of the following scenarios accurately describes a condition in which resonance can occur?

What is the electric force acting between two charges of 0.0072 C and - 0.0060 C that are 0.0040 m apart? A. 9.7 10^7 N B. - 9.7 10^7 N C. - 2.4 10^10 N D. 2.4 10^10 N

If a 42kg rolling object slows from 11.5 m/s to 3.33 m/s how much work does friction do?

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?

A container of gas is at a pressure of 3.7 * 105 Pa How much work is done by the gas if its volume expands by 1.6 m3?

A person carries a mass of 10 kg and walks along the + x-axis for a distance of 100m with a constant velocity of 2 m/s. What is the work done by this person? A) 20 J B) None of the other choices is correct. C) 0 J D) 200 J

Uranus has more than 14 times as much mass as earth, yet the gravitational force is less. how can that be?

What is velocity-time graph?